/Engine/Source/Runtime/Engine/Public/Animation/MotionTrajectoryTypes.h
Centripetal Catmull–Rom spline interpolation of all parameters of two trajectory samples.
[FTrajectorySample](API\Runtime\Engine\Animation\FTrajectorySample) SmoothInterp ( const [FTrajectorySample](API\Runtime\Engine\Animation\FTrajectorySample) & PrevSample, const [FTrajectorySample](API\Runtime\Engine\Animation\FTrajectorySample) & Sample, const [FTrajectorySample](API\Runtime\Engine\Animation\FTrajectorySample) & NextSample, float Alpha ) const